Add support for forcing stdint.h for sized types.

Public issue https://github.com/mackron/miniaudio/issues/334

miniaudio.h

@@ -3654,16 +3654,27 @@ extern "C" {
 #include <stddef.h> /* For size_t. */
 
 /* Sized types. */
-typedef   signed char           ma_int8;
-typedef unsigned char           ma_uint8;
-typedef   signed short          ma_int16;
-typedef unsigned short          ma_uint16;
-typedef   signed int            ma_int32;
-typedef unsigned int            ma_uint32;
-#if defined(_MSC_VER) && !defined(__clang__)
+#if defined(MA_USE_STDINT)
+    #include <stdint.h>
+    typedef int8_t   ma_int8;
+    typedef uint8_t  ma_uint8;
+    typedef int16_t  ma_int16;
+    typedef uint16_t ma_uint16;
+    typedef int32_t  ma_int32;
+    typedef uint32_t ma_uint32;
+    typedef int64_t  ma_int64;
+    typedef uint64_t ma_uint64;
+#else
+    typedef   signed char           ma_int8;
+    typedef unsigned char           ma_uint8;
+    typedef   signed short          ma_int16;
+    typedef unsigned short          ma_uint16;
+    typedef   signed int            ma_int32;
+    typedef unsigned int            ma_uint32;
+    #if defined(_MSC_VER) && !defined(__clang__)
         typedef   signed __int64    ma_int64;
         typedef unsigned __int64    ma_uint64;
-#else
+    #else
         #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
             #pragma GCC diagnostic push
             #pragma GCC diagnostic ignored "-Wlong-long"
@@ -3676,7 +3687,9 @@ typedef unsigned int            ma_uint32;
         #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
             #pragma GCC diagnostic pop
         #endif
-#endif
+    #endif
+#endif  /* MA_USE_STDINT */
+
 #if MA_SIZEOF_PTR == 8
     typedef ma_uint64           ma_uintptr;
 #else